Finding the Fourth Proportional to 1,065.78, 1,598.94 and 1,047.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.78 : 1,598.94 = 1,047.42 : x
2. Step 2: Convert to fraction form
   1,065.78/1,598.94 = 1,047.42/x
3. Step 3: Cross multiply
   1,065.78x = 1,598.94 × 1,047.42
4. Step 4: Simplify right side
   1,065.78x = 1,674,761.73
5. Step 5: Solve for x
   x = 1,674,761.73/1,065.78
6. Step 6: Final answer
   x = 1,571.40